• Certainty in the quality of every sachet and bottle of our predatory mites

  May 19, 2025

  viability of these beneficial organisms until their release in the field. Science and experience as the keys to success Bertha's expertise in biological [...] combination of scientific research, cutting-edge technology, and deep respect for nature distinguishes Koppert in the global market. The legacy of our founder [...] through the commitment of everyone involved in breeding and distribution. Jan Koppert, a visionary Dutch grower, pioneered the use of natural solutions for

• How to protect bumblebees in cold

  pollination in greenhouses In tunnels or greenhouses, the morning temperature needs to rise quickly to reach the minimum 24-hour temperature of 15 ºC for [...] any issues with the foraging activity of the bumblebees, leading to efficient pollination . Placement of hives in low temperatures During the colder months [...] is key Place the hives in the warmest part of the tunnel/greenhouse, ensuring they catch the morning sun. Make sure the hive is in a sheltered environment

• Canadian Thrips in Greenhouses & Grow Rooms

  September 19, 2024

  invisibly in the form of eggs deposited in leaf or flower tissue. This is especially evident in tropical and exotic ornamentals where plant material is often [...] influx of thrips via vents often with extreme peaks as outside crops are harvested or dry up sending large amounts of thrips airborne in search of a new [...] invasive species of thrips that have emerged out of South Asia. In recent years it has become an up-and-coming pest in North America appearing in places like

• RedStar places trust in Natutec Scout

  see how the level of infestation is developing.’ A lot of time saved This trend in level of infestation pressure is now visible in easy-to-understand [...] recognized. I now have more trust in the result.’ From Jan’s point of view, it is not even about the exact number of whitefly stuck on the sticky traps [...] the same? That's what I want to see,’ says Jan. ‘In addition, our scouts and I save an enormous amount of time compared with the former manual counting.

• Black rot of carrots

  Survival can be several years, in the case of black rot of carrots ( Alternaria radicina ) up to 8 years. Damage symptoms Black rot of carrots ( Alternaria radicina [...] by sporulation. Species may differ in specific symptoms. Life cycle and appearance of Black rot of carrots Black rot of carrots ( Alternaria radicina ) is [...] are the main source of primary infection and this may lead to death of seedlings. From the primary infection of leaves, this type of carrot disease can

• Bacterial canker of tomato

  the plants in greenhouse crops and by water in field crops, for example through splashes of rain or irrigation. Both in greenhouses and in the field, spraying [...] with a brown centre. In potato, the disease usually only occurs in the second half of the season. The first symptoms are wilting of the lower leaves and [...] and subsequent expansion of the wilt upwards. Cutting the stem at the foot shows whitish ooze with bacteria in the case of C lavibacter infection, but other

• Root rot of carrot

  concentration of this disease in the rather acidic soils (of southwestern Norway). Spore germination was inhibited in nonsterile soil but not in similar soil [...] increase in number and size until they merge, after which whole sections of the leaf will die off. The fungus appears to prefer older tissue. In the field [...] exhibit by necrotic leaf spots Life cycle and appearance of Root rot of carrots The fungus of R. carotae has delicate, simple morphological features hence

• Black leg of seedlings

  Pythium affects roots, in particular those of seedlings. Infected plants lag in growth. Seedlings fall over (‘ damping-off ’). In slightly older plants [...] infection is the easy stripping of the skin from the root cortex with a finger nail. Life cycle and appearance of Black leg of seedlings Pythium belongs to [...] by humans or machinery. Pythium can survive very well in the soil or substrate in the absence of plants. Many species are entirely saprophytic, so these

• Harnessing the Power of Parasitic Wasps

  March 21, 2024

  known as honeydew (a bi-product of their sap-feeding). Honeydew can accumulate on plant surfaces, promoting the growth of sooty mold (a black powdery fungus) [...] provide a buffer for a variety of situations, making them suitable for a range of temperature and pressure conditions. Timing of Introduction: Determine whether [...] impact on the behavior of the parasites. Their flying capabilities are reduced, and they tend to predominantly crawl in search of whiteflies. To compensate

• Using Predatory Mites, but still having Thrips Issues? Close the Gap in your Thrips Control Program

  July 16, 2024

  plant material, clothing, pets, or flying in from outside. Once in the growing space, thrips immediately begin damaging plants by a combination of feeding [...] common issue in failed thrips control programs. Thrips are a widespread threat in most environments, entering growing spaces a variety of ways: on new [...] mobile thrips in the crop (larva and adults). For larger thrips species more common in tropical plants, it is best to use a combination of Chrysoperla carnea